How to use
The unblocking tool separates the gas lift cylinder from the chair base. Over time, the gas lift becomes wedged tightly into the base due to body weight and friction. This tool provides the leverage needed to release it without damaging the base or mechanism.
- Turn the chair upside down so the base faces up.
- Remove the star base from the gas lift column (pull firmly or tap with a rubber mallet).
- Place the unblocking tool around the gas lift column, resting it on top of the seat mechanism.
- Tap the tool firmly with a rubber mallet. The gas lift will drop out of the mechanism.
- Insert your new gas lift into the mechanism (it drops in, no tools needed).
- Reattach the star base by pressing it onto the gas lift column.
Tip: If the gas lift is very stuck, apply a small amount of penetrating oil (WD-40) around the join and wait 10 minutes before trying again.
Frequently Asked Questions
Yes. The gas lift is held in place by a friction fit (a tapered cone pressed into the mechanism housing). Without this tool, you cannot safely separate the two parts. Attempting to use a screwdriver or chisel risks damaging the mechanism or base.
This tool is designed for HAG gas lift columns. Most office chair gas lifts use a similar tapered fit, so it may work on other brands, but we cannot guarantee compatibility. The inner diameter is sized for HAG cylinders specifically.
A rubber mallet (or a regular hammer with a piece of wood to protect the tool). That is all. The whole job takes about 5 minutes once you have the chair flipped over.
